| 1 |
3032
|
perry
|
/*
|
| 2 |
|
|
|
| 3 |
|
|
throws.js -- Adds a `throws_` method to AnotherWay test objects.
|
| 4 |
|
|
|
| 5 |
|
|
Copyright 2005 MetaCarta, Inc., released under the BSD License.
|
| 6 |
|
|
|
| 7 |
|
|
|
| 8 |
|
|
A reference to this file needs to be added to `run-tests.html` in the
|
| 9 |
|
|
head element after the AnotherWay classes are created:
|
| 10 |
|
|
|
| 11 |
|
|
<script type="text/javascript" src="throws.js"></script>
|
| 12 |
|
|
|
| 13 |
|
|
Then, it can be used just like the `ok`, `fail` and other such methods
|
| 14 |
|
|
in your unit tests.
|
| 15 |
|
|
|
| 16 |
|
|
e.g.
|
| 17 |
|
|
|
| 18 |
|
|
t.throws_(function () {new OpenLayers.View.Map.Dynamic();},
|
| 19 |
|
|
ReferenceError("No container supplied."),
|
| 20 |
|
|
"OpenLayers.View.Map.Dynamic instantiation with no container "
|
| 21 |
|
|
+ "must throw.");
|
| 22 |
|
|
|
| 23 |
|
|
This was inspired by the `assertRaises` method of Python's unittest
|
| 24 |
|
|
library.
|
| 25 |
|
|
|
| 26 |
|
|
Possible future enhancements:
|
| 27 |
|
|
|
| 28 |
|
|
* Contribute to official AnotherWay distribution.
|
| 29 |
|
|
* Use `apply` rather than require a inner function (or as an option).
|
| 30 |
|
|
* Preserve the stack fields.
|
| 31 |
|
|
|
| 32 |
|
|
*/
|
| 33 |
|
|
|
| 34 |
|
|
Test.AnotherWay._test_object_t.prototype.throws_ =
|
| 35 |
|
|
function (fn, expectedException, doc) {
|
| 36 |
|
|
/*
|
| 37 |
|
|
|
| 38 |
|
|
Executes the supplied function object catching any exception(s)
|
| 39 |
|
|
thrown, then verifies the supplied expected exception occurred.
|
| 40 |
|
|
|
| 41 |
|
|
If no exception is thrown the test fails.
|
| 42 |
|
|
|
| 43 |
|
|
If an exception is thrown and it does not match the supplied
|
| 44 |
|
|
expected exception the test fails.
|
| 45 |
|
|
|
| 46 |
|
|
If the exception thrown matches the supplied expected exception
|
| 47 |
|
|
the test passes.
|
| 48 |
|
|
|
| 49 |
|
|
Two exceptions "match" if Test.AnotherWay's `eq` method considers
|
| 50 |
|
|
the two equal when their respective stacks are ignored.
|
| 51 |
|
|
|
| 52 |
|
|
fn - The function object to be executed
|
| 53 |
|
|
expectedException - The exception object expected to result
|
| 54 |
|
|
doc - Description of the test
|
| 55 |
|
|
|
| 56 |
|
|
Note: The name of this method is `throws_` (with a trailing
|
| 57 |
|
|
underscore) as `throws` is a reserved identifier and can
|
| 58 |
|
|
not be used as a method name.
|
| 59 |
|
|
|
| 60 |
|
|
Note: This function does not preserve the stack field associated
|
| 61 |
|
|
with either exception.
|
| 62 |
|
|
|
| 63 |
|
|
*/
|
| 64 |
|
|
var theCaughtException = null;
|
| 65 |
|
|
|
| 66 |
|
|
try {
|
| 67 |
|
|
fn();
|
| 68 |
|
|
} catch (innerCaughtException) {
|
| 69 |
|
|
// As `innerCaughtException` is not visible outside the scope
|
| 70 |
|
|
// of this `catch` block we need to make it visible explicitly.
|
| 71 |
|
|
theCaughtException = innerCaughtException;
|
| 72 |
|
|
}
|
| 73 |
|
|
|
| 74 |
|
|
if (theCaughtException) {
|
| 75 |
|
|
// We delete the stacks before comparison as they will never match.
|
| 76 |
|
|
delete theCaughtException.stack;
|
| 77 |
|
|
delete expectedException.stack;
|
| 78 |
|
|
this.eq(theCaughtException, expectedException, doc);
|
| 79 |
|
|
} else {
|
| 80 |
|
|
this.fail(doc);
|
| 81 |
|
|
}
|
| 82 |
|
|
}
|